Warp stop-motion for looms.



No. 735 l84. PATENTED AUG. 4, 1903. A. WENNING & J. BIOKING. WARP STOP MOTION FOR LOOMS.

APPLICATION FILED JAN. 15, 1903.

K0 MODEL.

FIG 1 UNITED STATES Patented August 4, 1903.

PATENT OFFICE.

ALFRED \VENNING AND JULES BICKING, OF MIILIIAUSEN,"GERMANY, AS-

SIGNORS TO THE FIRM OF SOOIFTF ALSAOIENNE DE CONSTRUGTIONS MEOANIGUES, OF MIILHAUSEN, ALSAOE, GERMANY.

WARP STOP-MOTION FOR'LOOMS.

SPECIFICATION forming part of Letters Patent No. 735,184, dated .A ugust 4, 1903.

Application filed January 15, 1903. Serial No. 139,124. (No model.)

T to whom it 177/662] concern: I

Be it known that we,ALFRnD WENNING and J ULES BICKING, both subjects of the Emperor of Germany, and residents of Miilhausen, Alsace, Germany, have invented new and useful Improvements in Warp Stop-Wlotions for Looms, of which the following is afull, clear, and exact specification.

The warp stop-motions usually employed [0 consist of droppers (steel blades) which are supported behind the harness of the looms upon the warp-threads, and the falling down of which when a warp-thread breaks effects a stoppage of the loom either mechanically or by electrical contact. These droppers are generally guided by rigidly-supported bars. Consequently there is caused by the forwardand-backward movement of the warp-threads to the extent of five or ten millimeters, which results when the shed is opened and also when the weft-thread is beaten up, an injurious rubbing of the warp-threads on the droppers. By means of the present invention this drawback is obviated, the dropper-guiding device being movably arranged in order that it, to-

gether with the dropping blades, can follow the forward-and-backward motion of the warp threads by an oscillating movement.

A further object of our invention consists in that upon the falling down of a blade on the breaking of the corresponding warpthread the stoppage of the loom takes place by the aid of the weft stop-lever.

The accompanying drawings illustrate in Figure 1, in vertical section, a loom provided with this invention. Figs. 2 and 3 show parts of the device on an enlarged scale.

In the figures, 1 and 2 indicate two rows of blades similar to the well-known dropping 4 blades now in use. Through the opening 3, Fig. 3, of each blade one of the warp-threads is drawn. The, cross-bars 4, by which these blades are guided, are secured to the two side pieces 5, connected together by a cross-bar 13 and placed within the loom-frame. The side pieces 5are pivoted at their low end upon the pivots 6 and are connected by cords 7 or otherwise with a cross-beam 80, carried by arms 8, swinging on the pivots 14. This beam receives its oscillating motion from two eccentrics 9, which can act upon the arms 15 on the pivots 14, and are so formed and adjusted that the beam, and with it the blade-carrier 5 5 4 4, must execute a motion in accordance with the shifting of thewarp-threads when forming the shed. In consequence of the reciprocating motions of the blade-carrier 5 5 4c 4 and likewise of the blades 1 and 2, corresponding to the forward-and-backward motions of the warp-threads during the forming of the shed, all friction between the blades and the warp-threads is avoided, so that these latter are not in the least damaged by the blades.

In order to efiect the stoppage of the loom on the breaking of awarp-thread, in the illustrated construction there are provided in the well-known manner two rock-shafts 10, connected together by means of toothed segments 19, to each of which shafts, respectively, there 7c is attached an angle-bar l1,crossing the loom. These rock-shafts 10 receive their motion by means of a rod 20 from the weft stop-lever 12, which exists in all the looms at present used. When a warp-thread breaks, the blade 7 held on this thread falls down between the cross-bar 13 and one of the angle-bars 11, so as to come into the position indicated by dotted lines in Fig. 3. The projecting of this blade into the path of the respective anglebar 11 causes the stoppage of the oscillating bars 11 and of the weft stop-lever 12, so as to oblige this latter to take the position shown by dotted lines in Fig. 1. The stoppage of the loom will be effected by the lever 21, which carries a spring-dagger 25', which may be depressed into the path of a butfer18 on the lay. This dagger 25 is of a cam-like undu- .lating form on its upper side, and a laterallyprojecting pin 16 on the weft-hammer 17 plays over the dagger as said hammer vibrates. Under normal conditionsof the operation of the loom when the lay beats up the pin 16 is engaged by a depression in the dagger, and when the lay beats up the bulfer 5 18 passes under the dagger; but when a dropper falls from the parting of a warp-thread the oscillations of the weft-hammer 17 are checked and held in such a position that the pin 16 depresses the dagger 25 into the path of the buifer l8, and consequently when the lay heats up said bufier impinges on the end of the dagger, and through it causes the lever 21 to actuate the knock-01f lever, which in turn disengages the shipper-lever from its rest, and this latter stops the loom.

What we claim is 1. A Warp stop-motion for a loom, having droppers which ride on the warp-threads, carriers for said droppers mounted movably on the loom whereby they may move to and fro with the warp when the shed is formed and the weft beaten up, and means for operating said carriers synchronously with the lay.

2. A warp stop-motion for a loom, having droppers which ride on the warp-threads, carriers for the droppers mounted to oscillate about a center, whereby the droppers may partake of the movements of the warps in forming the shed and beating up the weft, and means for imparting at the proper times oscillating movements to said carriers.

3. A warp stop-motion for a loom, having droppers which ride on the unbroken warpthreads, a vibrating cross-bar below said droppers and in such position that'a fallen dropper interposes and prevents the vibration of said bar,the vibrating weft stop-lever, means whereby the said lever vibrates said cross-bar, loom -st0pping mechanism, and means whereby the arrest of the vibrations of the weft stop-lever by the fallen dropper sets in motion said loomstopping mechanism.

4. In a warp-stop mechanism, the combination with the movable carriers for the droppers, and the said droppers, of the cross-beam coupled to the said carriers, and means for swinging said beam innnison with the operations of the loom.

In witness whereof we have hereunto signed our names this 3d day of January, 1903, in the presence of two subscribing witnesses.

ALFRED WENNING. JULES BICKING. Witnesses:

GEO. GIFFORD, ALBERT GRAETER. 

